Ken Griffin’s Mesa Laboratories MLAB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $745K | Sell |
8,423
-50,098
| -86% | -$4.32M | ﹤0.01% | 8370 |
|
|
2025
Q4 | $4.59M | Buy |
58,521
+24,343
| +71% | +$1.85M | ﹤0.01% | 4415 |
|
|
2025
Q3 | $2.29M | Buy |
34,178
+7,305
| +27% | +$526K | ﹤0.01% | 5805 |
|
|
2025
Q2 | $2.53M | Buy |
26,873
+20,791
| +342% | +$2.28M | ﹤0.01% | 5278 |
|
|
2025
Q1 | $722K | Sell |
6,082
-735
| -11% | -$100K | ﹤0.01% | 7682 |
|
|
2024
Q4 | $899K | Sell |
6,817
-3,898
| -36% | -$479K | ﹤0.01% | 7270 |
|
|
2024
Q3 | $1.39M | Sell |
10,715
-13,980
| -57% | -$1.64M | ﹤0.01% | 6199 |
|
|
2024
Q2 | $2.14M | Sell |
24,695
-9,085
| -27% | -$951K | ﹤0.01% | 5177 |
|
|
2024
Q1 | $3.71M | Buy |
33,780
+6,512
| +24% | +$656K | ﹤0.01% | 4438 |
|
|
2023
Q4 | $2.86M | Buy |
27,268
+1,130
| +4% | +$110K | ﹤0.01% | 4723 |
|
|
2023
Q3 | $2.75M | Sell |
26,138
-20,851
| -44% | -$2.67M | ﹤0.01% | 4640 |
|
|
2023
Q2 | $6.04M | Buy |
46,989
+42,562
| +961% | +$6.49M | ﹤0.01% | 3353 |
|
|
2023
Q1 | $774K | Sell |
4,427
-46,111
| -91% | -$8.26M | ﹤0.01% | 7359 |
|
|
2022
Q4 | $8.4M | Buy |
50,538
+28,257
| +127% | +$4.43M | ﹤0.01% | 3059 |
|
|
2022
Q3 | $3.14M | Buy |
22,281
+17,680
| +384% | +$3.23M | ﹤0.01% | 4727 |
|
|
2022
Q2 | $938K | Sell |
4,601
-10,229
| -69% | -$2.24M | ﹤0.01% | 7172 |
|
|
2022
Q1 | $3.78M | Buy |
14,830
+13,291
| +864% | +$3.61M | ﹤0.01% | 4708 |
|
|
2021
Q4 | $505K | Sell |
1,539
-891
| -37% | -$280K | ﹤0.01% | 9677 |
|
|
2021
Q3 | $735K | Sell |
2,430
-3,192
| -57% | -$907K | ﹤0.01% | 8934 |
|
|
2021
Q2 | $1.52M | Sell |
5,622
-5,508
| -49% | -$1.4M | ﹤0.01% | 7282 |
|
|
2021
Q1 | $2.71M | Sell |
11,130
-961
| -8% | -$264K | ﹤0.01% | 5685 |
|
|
2020
Q4 | $3.47M | Buy |
12,091
+6,877
| +132% | +$1.89M | ﹤0.01% | 4336 |
|
|
2020
Q3 | $1.33M | Sell |
5,214
-7,882
| -60% | -$1.87M | ﹤0.01% | 5503 |
|
|
2020
Q2 | $2.84M | Buy |
13,096
+10,174
| +348% | +$2.35M | ﹤0.01% | 3953 |
|
|
2020
Q1 | $660K | Sell |
2,922
-3,434
| -54% | -$847K | ﹤0.01% | 6019 |
|
|
2019
Q4 | $1.58M | Buy |
+6,356
| New | +$1.49M | ﹤0.01% | 4786 |
|
|
2019
Q2 | – | Sell |
-3,975
| Closed | -$916K | – | 9596 |
|
|
2019
Q1 | $916K | Buy |
3,975
+1,216
| +44% | +$275K | ﹤0.01% | 5741 |
|
|
2018
Q4 | $575K | Sell |
2,759
-551
| -17% | -$107K | ﹤0.01% | 6193 |
|
|
2018
Q3 | $615K | Buy |
+3,310
| New | +$666K | ﹤0.01% | 6362 |
|
|
2016
Q4 | – | Sell |
-1,796
| Closed | -$205K | – | 7621 |
|
|
2016
Q3 | $205K | Sell |
1,796
-38
| -2% | -$4.33K | ﹤0.01% | 6269 |
|
|
2016
Q2 | $226K | Buy |
+1,834
| New | +$198K | ﹤0.01% | 5655 |
|
Other funds holding MLAB
LPP
VCM
RIM
RA
Ken Griffin's MLAB Position: Q1 2026 in Review
Ken Griffin reduced its Mesa Laboratories (MLAB) stake by 86% in Q1 2026, selling an estimated $4.32M and leaving 8,423 shares worth $745K. The position accounts for ﹤0.01% of the portfolio, ranked #8370.
Ken Griffin first reported a position in MLAB in Q2 2016 and has held it in 31 quarters since. The position peaked at $8.4M in Q4 2022. 161 funds tracked by Wall St. Rank hold MLAB as of Q1 2026.
- Ken Griffin held 8,423 shares of Mesa Laboratories worth $745K as of Q1 2026.
- Ken Griffin sold 50,098 Mesa Laboratories shares in Q1 2026, an estimated $4.32M.
- Mesa Laboratories made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #8370 holding.
- Ken Griffin first reported a position in Mesa Laboratories in Q2 2016 and has held it in 31 quarters since.
- Ken Griffin's Mesa Laboratories position peaked at $8.4M in Q4 2022.
- 161 funds tracked by Wall St. Rank held Mesa Laboratories as of Q1 2026.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.